bugfix for default duration
AppStyle.hpp + move style from TreeView
AppStyle gets style from GanttScene
managing tree vs gantt offset at tree header only
gantt scale has a header sunken style
gantt scale num are centered vertically
AppStyle in proj file
tasks accessors from GanttTask hierarchy
GanttItem::timeScale()
TimeScale constness
TaskViewHelper methods
GanttTask::barRect()
GanttTask::boundingRect
GanttTask::paint
GanttTask::replaceChildren() API
GanttMTasks::tasks_
GanttMTask::replaceChildren()
GanttScene::cycle_
GanttCycle is created in GanttScene
GanttScene::createGTask